CN113071372B - Energy management method for power semi-following fuel cell hybrid electric vehicle - Google Patents
Energy management method for power semi-following fuel cell hybrid electric vehicle Download PDFInfo
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- CN113071372B CN113071372B CN202110343713.8A CN202110343713A CN113071372B CN 113071372 B CN113071372 B CN 113071372B CN 202110343713 A CN202110343713 A CN 202110343713A CN 113071372 B CN113071372 B CN 113071372B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
- B60L58/31—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for starting of fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
Abstract
The invention provides a power semi-following fuel cell hybrid electric vehicle energy management method, when the charge quantity of a power battery is smaller than a first set threshold Sb, a vehicle control unit sends a starting signal to a fuel cell, and the fuel cell is started; when the electric charge of the power battery is larger than or equal to a second set threshold value Se, wherein Se is larger than Sb, the vehicle control unit sends a shutdown signal to the fuel battery, and the fuel battery is shut down; if the current electric power of the motor is larger than the current electric power compensation power of the power battery, the output power value of the fuel battery is the current electric power of the motor; and if the current electric power of the motor is less than or equal to the current power battery charge compensation power, taking the output power value of the fuel battery as the current power battery charge compensation power. The method is simple and feasible, the controllable power battery works in a smaller charge range, and the service life of the power battery is prolonged.
Description
Technical Field
The invention relates to an energy management method for a power semi-following fuel cell hybrid electric vehicle.
Background
In a fuel cell hybrid electric vehicle, a vehicle controller manages vehicle energy by controlling the start-stop and output power of a fuel cell. The output power of the fuel cell is limited by devices such as an air compressor, and the load change speed cannot directly follow the load change speed of the power demand of the whole vehicle, so that the fuel cell system generally needs to be connected with an energy storage system (such as a power battery, a super capacitor and the like) in parallel to make up for the power demand of the rapid change of the whole vehicle. The conventional fuel cell energy management mode is usually associated with a power cell, when the charge capacity of the power cell is low, a vehicle control unit controls the fuel cell to start and output high power, and when the charge capacity of the power cell is high, the vehicle control unit controls the fuel cell to output low power and even stop. The energy management mode can ensure that the vehicle normally runs, but the charge quantity of the power battery often fluctuates in a large range, so that the power battery Chi Shendu charges and discharges, and the service life of the power battery is shortened.
Disclosure of Invention
The invention aims to provide a simple and feasible energy management method for a power semi-following fuel cell hybrid electric vehicle, which can control a power cell to work in a smaller electric charge range and prolong the service life of the power cell.
The invention is realized by the following scheme:
when the charge quantity of a power battery is smaller than a first set threshold Sb, a vehicle control unit sends a starting signal to the fuel battery, and the fuel battery is started to provide power for the power battery and other electric devices; when the electric charge of the power battery is larger than or equal to a second set threshold value Se, wherein Se is larger than Sb, the vehicle control unit sends a stop signal to the fuel battery, the fuel battery stops, and the power battery stops charging and supplies power to other electric devices; the actual output power of the fuel cell during starting is taken as follows: if the current motor electric power is larger than the current power battery charge compensation power, the output power value of the fuel battery is the current motor electric power; and if the current electric power of the motor is less than or equal to the current power battery charge compensation power, taking the output power value of the fuel battery as the current power battery charge compensation power. Other electrical appliances generally comprise a motor controller, an air pump, an oil pump, an air conditioner and other high-voltage electrical appliances.
Further, the current power battery charge compensation power P s Calculated according to the formula (1):
wherein, P f max Is the rated power of the fuel cell, which is a fixed parameter of the fuel cell; p f min The minimum stable output power of the fuel cell is a fixed parameter of the fuel cell; s max Is the highest target value of the power battery charge, and S max ≤Se；S min The minimum target value of the charge quantity of the power battery is set; s is the actual charge of the current power battery; delta is an adjustment coefficient, and its value is P f min And P f max Is 1 and does not contain a lower boundary value, namely P f min And P f max The specific value of (c) can be selected according to specific situations.
Further, the highest target value S of the charge capacity of the power battery max Taking the value in 60-85%, and obtaining the lowest target value S of the power battery charge min Taking the value in 45-65%.
Further, the first set threshold Sb is 55% to 85%, and the second set threshold Se is 65% to 90%.
Further, the current motor electric power is calculated according to the current voltage and current signals of the motor controller, and the calculation method is carried out according to the prior art.
The energy management method of the power semi-following fuel cell hybrid electric vehicle is simple and feasible, and the output power of the fuel cell is reasonably controlled, so that the power cell is stably controlled in a smaller charge range, namely the highest target value S of the charge of the power cell max And the lowest target value S of the power battery charge min The charging and discharging depth of the power battery is reduced, and the service life of the power battery is prolonged.
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited to the description of the examples.
Example 1
When the charge quantity of a power battery is smaller than a first set threshold Sb, the first set threshold Sb takes a value in 55-85%, a vehicle control unit sends a starting signal to the fuel battery, and the fuel battery is started to provide power for the power battery and other electric devices; when the electric charge of the power battery is larger than or equal to a second set threshold value Se, wherein Se is larger than Sb, the value of the second set threshold value Se is 65-90%, the vehicle control unit sends a stop signal to the fuel battery, the fuel battery stops, and the power battery stops charging and provides power for other electric devices; the actual output power of the fuel cell during starting is taken as follows: if the current motor electric power is larger than the current power battery charge compensation power, the output power value of the fuel battery is the current motor electric power; if the current electric power of the motor is less than or equal to the current power battery charge compensation power, the output power value of the fuel battery is the current power battery charge compensation power; the current motor electric power is calculated according to the current voltage and current signals of the motor controller, and the calculation method is carried out according to the prior art.
Current power battery charge compensation power P s Calculated according to the formula (1):
wherein, P f max Is the rated power of the fuel cell, which is a fixed parameter of the fuel cell; p is f min The minimum stable output power of the fuel cell is a fixed parameter of the fuel cell; s max Is the highest target value of the charge of the power battery, and S max ≤Se，S max Taking the value in 60-85%; s. the min Is the lowest target value of the charge capacity of the power battery, S min Taking the value in 45-65%; s is the actual charge of the current power battery; delta is an adjustment coefficient, and its value is P f min And P f max Is 1 and does not contain a lower boundary value, namely P f min And P f max The specific value of (A) can be selected according to specific situations.
For example, the rated power P of the fuel cell f max 110KW, lowest stable output power P of fuel cell f min Is 10KW, the highest target value S of the charge quantity of the power battery max 65%, the lowest target value S of the charge quantity of the power battery min 50%, the value of the adjustment coefficient delta is 0.5, the actual charge quantity S of the current power battery is 58%, and the actual charge quantity S is substituted into the formula (1) to calculate and obtain the compensation power P of the charge quantity of the current power battery s Is 31KW. Then, current motor electric power is obtained through calculation according to current voltage and current signals of the motor controller, and if the current motor electric power is larger than current power battery charge compensation power, the output power value of the fuel battery is the current motor electric power; and if the current electric power of the motor is less than or equal to the current power battery charge compensation power, the output power value of the fuel battery is the current power battery charge compensation power, namely 31KW.
Claims (4)
1. A power semi-following type fuel cell hybrid electric vehicle energy management method is characterized in that: when the charge quantity of the power battery is smaller than a first set threshold Sb, the vehicle control unit sends a starting signal to the fuel battery, and the fuel battery is started to provide power for the power battery and other electric devices; when the electric charge of the power battery is larger than or equal to a second set threshold value Se, wherein Se is larger than Sb, the vehicle control unit sends a stop signal to the fuel battery, the fuel battery stops, and the power battery stops charging and supplies power to other electric devices; the actual output power of the fuel cell during starting is taken as follows: if the current motor electric power is larger than the current power battery charge compensation power, the output power value of the fuel battery is the current motor electric power; if the current electric power of the motor is less than or equal to the current power battery charge compensation power, the output power value of the fuel battery is the current power battery charge compensation power;
the current power battery charge compensation power P s Calculated according to the formula (1):
wherein, P fmax Rated power for the fuel cell; p fmin The minimum stable output power of the fuel cell; s max Is the highest target value of the charge of the power battery, and S max ≤Se；S min The minimum target value of the charge quantity of the power battery is set; s is the actual charge of the current power battery; delta is an adjustment coefficient, and its value is P fmin And P fmax 1, and does not contain a lower boundary value.
2. The power semi-follow fuel cell hybrid vehicle energy management method of claim 1, characterized in that: the highest target value S of the charge quantity of the power battery max Taking the value in 60-85%, and obtaining the lowest target value S of the power battery charge quantity min Taking the value in 45-65%.
3. The power semi-follow fuel cell hybrid vehicle energy management method according to claim 1 or 2, characterized in that: the first set threshold Sb is 55-85% and the second set threshold Se is 65-90%.
4. The power semi-follow fuel cell hybrid vehicle energy management method according to claim 1 or 2, characterized in that: the current electric power of the motor is calculated according to the current voltage and current signals of the motor controller.
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| CN202110343713.8A CN113071372B (en) | 2021-03-30 | 2021-03-30 | Energy management method for power semi-following fuel cell hybrid electric vehicle |
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| CN202110343713.8A CN113071372B (en) | 2021-03-30 | 2021-03-30 | Energy management method for power semi-following fuel cell hybrid electric vehicle |
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| CN113071372B true CN113071372B (en) | 2022-10-04 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110182071A (en) * | 2019-05-10 | 2019-08-30 | 中国第一汽车股份有限公司 | A kind of power follower type fuel cell vehicle energy management control method |
| CN110861538A (en) * | 2019-11-01 | 2020-03-06 | 深圳国氢新能源科技有限公司 | Fuel cell automobile hybrid power control method and system |
| CN111152690A (en) * | 2018-11-08 | 2020-05-15 | 郑州宇通客车股份有限公司 | Energy control method and system for multi-power-supply time-varying characteristic of fuel cell vehicle |
| CN111605440A (en) * | 2020-06-05 | 2020-09-01 | 中国重汽集团济南动力有限公司 | System and method for controlling running power of vehicle fuel cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050214602A1 (en) * | 2004-03-26 | 2005-09-29 | Manish Sinha | Load following algorithm for a fuel cell based distributed generation system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111152690A (en) * | 2018-11-08 | 2020-05-15 | 郑州宇通客车股份有限公司 | Energy control method and system for multi-power-supply time-varying characteristic of fuel cell vehicle |
| CN110182071A (en) * | 2019-05-10 | 2019-08-30 | 中国第一汽车股份有限公司 | A kind of power follower type fuel cell vehicle energy management control method |
| CN110861538A (en) * | 2019-11-01 | 2020-03-06 | 深圳国氢新能源科技有限公司 | Fuel cell automobile hybrid power control method and system |
| CN111605440A (en) * | 2020-06-05 | 2020-09-01 | 中国重汽集团济南动力有限公司 | System and method for controlling running power of vehicle fuel cell |
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